Added missing reference to lifespan scoped dependencies page in the learn tab

docs/en/mkdocs.yml

@@ -144,6 +144,7 @@ nav:
       - tutorial/dependencies/dependencies-in-path-operation-decorators.md
       - tutorial/dependencies/global-dependencies.md
       - tutorial/dependencies/dependencies-with-yield.md
+      - tutorial/dependencies/lifespan-scoped-dependencies.md
     - Security:
       - tutorial/security/index.md
       - tutorial/security/first-steps.md